Distillation: processes – thermolytic – With physical separation of solid by-product from removed... – Gas or vapor containing mixture
Reexamination Certificate
2005-04-05
2005-04-05
Bhat, N. (Department: 1764)
Distillation: processes, thermolytic
With physical separation of solid by-product from removed...
Gas or vapor containing mixture
C201S005000, C201S006000
Reexamination Certificate
active
06875316
ABSTRACT:
Related to a blast furnace coke and a production method thereof. A coke having high reactivity and high strength in which coke strength, reactivity with CO2and a pore size distribution are each at a desired level can be produced at a low cost by using a coal blend composed of a small number of brands comprising a large quantity of caking coal having medium rank and low fluidity. The blast furnace coke, being obtained by charging a coal blend comprising 60 wt % or more of semi-heavy caking coal having medium rank and low fluidity in which a content of inert component is 30 vol % or more in total or another coal blend comprising 60 wt % to 95 wt % of semi-heavy caking coal having medium rank and low fluidity in which mean reflectance (Ro) is 0.9 to 1.1 and maximum fluidity (MF) is less than 3.0 and the balance being a caking coal in which mean reflectance (Ro) exceeds 1.1 into a coke oven and coking the coal blend, which has a pore size distribution where a content ratio of pores having a diameter of less than 10 μm is from 12 vol % to 15 vol % and a content ratio of pores having a diameter of from 10 μm to 100 μm is from 10 vol % to 15 vol % and the production method thereof.
REFERENCES:
patent: 4100031 (1978-07-01), Kiritani et al.
patent: 4419186 (1983-12-01), Wienert
patent: 11021561 (1999-01-01), None
patent: 11241072 (1999-09-01), None
patent: 2001011472 (2001-01-01), None
Baba Shinjiro
Hanaoka Koji
Igawa Katsutoshi
Kasaoka Shizuki
Sakamoto Seiji
Bhat N.
JFE Steel Corporation
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